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Method for determining crude oil cracking degree

A crude oil cracking and degree technology, applied in measuring devices, instruments, material analysis by electromagnetic means, etc., can solve problems such as inaccuracy

Active Publication Date: 2019-11-05
PETROCHINA CO LTD
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Problems solved by technology

Early studies believed that temperature is the only factor affecting the cracking of crude oil, but it is not accurate enough to evaluate the original cracking degree only by temperature

Method used

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  • Method for determining crude oil cracking degree
  • Method for determining crude oil cracking degree
  • Method for determining crude oil cracking degree

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Embodiment Construction

[0062] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0063] The present invention is illustrated by taking Tarim Basin oil and gas reservoirs as an example:

[0064] 1) Take 200mg crude oil sample in 2mL autosampler bottle, add 0.5μg / μL D 16 - 40 μL of adamantane standard sample, after mixing evenly, add dichloromethane to 1.5 mL.

[0065] 2) The crude oil samples were analyzed by a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOFMS) produced by Leco Company of the United States. The adamantane series compounds are identified and identified, and the peak information of each compound is obtained, such as Figure 2a-Figure 2f It...

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Abstract

The invention discloses a method for determining crude oil cracking degree. The method comprises the following steps: S1, recognizing and identifying ethyldeamantadine series and methyl diamantine series compounds in multiple crude oil samples by utilizing a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer GC*GC-TOFMS, thus obtaining peak information of each compound; S2, performing quantitative analysis on the ethyldeamantadine series compounds, thus obtaining contents of the ethyldeamantadine series and methyl diamantine series compounds; S3, fitting a relational expression between the contents of the ethyldeamantadine series compounds and (4-+3-) methyl diamantine; S4, building a relationship between (4-+3-) methyl diamantine and the crude oil cracking degree; and S5, determining the crude oil cracking degree. The method disclosed by the invention can determine the crude oil cracking degree only by virtue of a small amount of crude oil sample, a deepoil and gas cracking window is judged, further quantity of deep oil and gas resources is evaluated, and exploration and development are guided.

Description

technical field [0001] The invention belongs to the technical field of petroleum sample analysis, and in particular relates to a method for determining the cracking degree of crude oil. Background technique [0002] Crude oil cracking is ubiquitous in deep oil and gas reservoirs, and the degree of crude oil cracking reflects the degree of conversion of crude oil to natural gas after undergoing a high evolution stage in geological bodies. Crude oil cracking gas can be used as an important source of natural gas, and it is also an important direction for future natural gas exploration. Early studies believed that temperature is the only factor affecting the cracking of crude oil, but it is not accurate enough to evaluate the original cracking degree only by temperature. With the deepening of research, the (4-+3-) methyl bis-adamantane index proposed by Dahl et al. and ) are promoted for use. [0003] Comprehensive two-dimensional gas chromatography (GC×GC) is a new analytica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N27/62
CPCG01N30/02G01N30/06G01N30/8679G01N27/62G01N2030/025
Inventor 朱光有池林贤王萌张志遥李婷婷杨海军韩剑发陈志勇陈玮岩
Owner PETROCHINA CO LTD
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